internal static CompilationUnitSyntax AddObsoleteAttribute(this CompilationUnitSyntax root, ref ConstructorDeclarationSyntax constructorDeclaration, string message = null)
{
var arguments = !string.IsNullOrWhiteSpace(message) ? SyntaxFactory.ParseAttributeArgumentList($"(\"{message}\")") : default;
return(root.AddCustomAttribute(ref constructorDeclaration, "Obsolete", arguments));
}